S+S Regeltechnik HYGRASREG RHT-30 Series Operating Instructions, Mounting & Installation Download Page 6

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HYGRASREG

RHT - 30

Rev. 2020 - V22

Electronic room hygrostat and/or room thermostat

HYGRASREG

RHT-30

with one continuous and two switching outputs, adjustable switching

thresholds, with ⁄ without optional display for indicating ACTUAL humidity and/or ACTUAL temperature (accuracy  class  ± 2.0 % r.H.). The setpoints
can be allocated to the relative humidity and/or to the temperature. It is suitable for regulating and monitoring relative humidity (humidifying and
dehumidifying) and/or the temperature (heating and cooling), e.g. in ventilation and air conditioning ducts, laboratories, production facilities, climatic
test cabinets, indoor swimming pools, greenhouses, etc., to control humidifying and dehumidifying equipment or heating system control. The measuring
transducers are designed for exact humidity/temperature measurement. The RHT-30 uses a digital, long-term stable sensor as a measuring element.
It is used in dust-free, unpolluted, non-aggressive air.

TECHNISCHE DATEN

Power supply:

24 V AC (± 20 %), 15...36 V DC

Load resistance:

> 5 kOhm

Power consumption:

< 1,5 VA ⁄ 24 V DC, < 3,5 VA ⁄ 24 V AC

Sensor:

digital humidity sensor with integrated temperature sensor,

low hysteresis, high long-term stability

Setting range:

5...95 % r.H. (Humidity)
+5...+ 45 °C (Temperature)
(switch steps 1 and 2 are separately adjustable)

Operating difference:

Mode 1:

both switch steps are freely adjustable (rel. humidity)

Mode 2:

5 % between both switch steps (rel. humidity)

Mode 3:

both switch steps freely adjustable (temperature)

Mode 4:

switch step 1 (temperature), switch step 2 (rel. humidity)

(adjustable via DiP switches)

Output:

potential-free changeover contacts (2 x changeover contact 24 V, 1A ohmic load, separately adjustable, 1x 0 - 10 V)

Deviation, humidity:

typically

± 2.0 %

(20...80 % r. H.) at +25 °C, otherwise ± 3.0 %

Deviation, temperature:

typically

± 0.2 K

at +25 °C

Ambient temperature:

storage –35...+85 °C; operation – 30...+70 °C, non-precipitating

Long-term stability:

± 1 % per year

Housing:

plastic, material ABS, colour pure white (similar to RAL 9010)

Housing dimensions:

98 x 98 x 35 mm (Baldur 2)

Installation:

wall mounting or on in-wall flush box, Ø 55 mm, base with 4-hole for mounting on vertically or horizontally installed
in-wall flush boxes for cable entry from the back, with predetermined breaking point for on - wall cable entry from
top ⁄ bottom in case of plain on - wall installation

Protection class:

III (according to EN 60 730)

Protection type:

IP 30 (according to EN 60 529)

Electrical connection:

0.14 - 1.5 mm

, via terminal screws

Standards:

CE conformity, EMC directive 2014 ⁄ 30 ⁄ EU

Optional: two-line

display with illumination,

cutout approx. 36 x15 mm (W x H),

for displaying ACTUAL humidity and/or ACTUAL temperature respectively for setpoint adjustment

FUNCTION

Humidifying/heating:

1st step:

wire contacts 11 - 12.

If actual humidity falls more than 3 % r.H. / 1 K (hysteresis) below switching threshold S1,
the changeover contact switches to 11 - 12.

2. step:

wire contacts 21 - 22.

If actual humidity falls more than 3 % r.H. / 1 K (hysteresis) below switching threshold S2,
the changeover contact switches to 21 - 22.
Terminal 2: output relative humidity  / temperature

Dehumidifying/cooling:

1st step:

wire contacts 11 - 13.

When actual humidity exceeds switching threshold S1, the changeover contact switches to 11 - 13.

2. step:

wire contacts 21 - 23.

When actual humidity exceeds switching threshold S 2, the changeover contact switches to 21 - 23.
Terminal 2: output relative humidity / temperatur

HYGRASREG

RHT - 30

Room hygrostats and humidity and temperature sensors (± 2.0 %)

Type ⁄ WG02

Setting Range